| The Contemporary Youth Orchestra of Cleveland |
| The Continental IV |
| The Contortionist |
| The Contours |
| The Controllers |
| The Controls |
| The Conway Brothers |
| The Conway Brothers Hiccups Orchestra |
| The Cook Trio |
| The Cookies |
| The Cool Kids |
| The Cool Moose Orchestra |
| The Cool Waters Band |
| The Cool Yule Band |
| The Cooltrane Quartet |
| The Coon-Sanders Nighthawks |
| The Cooper Temple Clause |
| The Coral |
| The Coral Reefer Band |
| The Corbans |
| The Cordettes |
| The Coriovallum Pipeband |
| The Cornell Hurd Band |
| The Cornells |
| The Cornerstones |
| The Coronas |
| The Corporation |
| The Corries |
| The Corrs |
| The Corsairs |
| The Corvairs |
| The Cosmic Brotherhood |
| The Cosmic Rays |
| The Costello Show |
| The Cottars |
| The Cotton Club |
| The Cotton Pickers |
| The Count |
| The Count & Sinden |
| The Count Five |
| The Countdown |
| The Countdown Artists |
| The Countdown Kids |
| The Countdown Orchestra |
| The Countdown Singers |
| The Country Boys |
| The Country Choral |
| The Country Dance Kings |
| The Country Deputy Band |
| The Country Gentlemen |
| The Country Rockers |
| The Counts |
| The County |
| The Coup |
| The Coup de Grace |
| The Course |
| The Courteeners |
| The Coventry Automatics |
| The Cover Girls |
| The Coverbeats |
| The Covingtons |
| The Coward Brothers |
| The Cowboy Church Sunday School |
| The Cowsills |
| The Cowslingers |
| The Cox Family |
| The Coyotes |
| The Crabb Family |
| The Crabs |
| The Crack |
| The Cramps |
| The Cranberries |
| The Cranes |
| The Crash |
| The Crash Motive |
| The Crawdads |
| The Crawford Jazz Band |
| The Crazy World of Arthur Brown |
| The Creaking Tree String Quartet |
| The Creation |
